\contentsline {section}{\numberline {1}七段数码管的正确打开方式}{1}{}%
\contentsline {section}{\numberline {2}中断的意义}{1}{}%
\contentsline {section}{\numberline {3}一种避免小键盘造成的叠加现象的方法}{2}{}%
\contentsline {section}{\numberline {4}总结}{3}{}%
\contentsline {paragraph}{}{3}{}%
